1 /* 2 * Copyright (C) 2012 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.io; 18 19 import com.google.common.collect.ImmutableSet; 20 21 import java.io.ByteArrayOutputStream; 22 import java.io.IOException; 23 import java.io.OutputStream; 24 25 /** 26 * A byte sink for testing that has configurable behavior. 27 * 28 * @author Colin Decker 29 */ 30 public class TestByteSink extends ByteSink implements TestStreamSupplier { 31 32 private final ByteArrayOutputStream bytes = new ByteArrayOutputStream(); 33 private final ImmutableSet<TestOption> options; 34 35 private boolean outputStreamOpened; 36 private boolean outputStreamClosed; 37 38 public TestByteSink(TestOption... options) { 39 this.options = ImmutableSet.copyOf(options); 40 } 41 42 byte[] getBytes() { 43 return bytes.toByteArray(); 44 } 45 46 @Override 47 public boolean wasStreamOpened() { 48 return outputStreamOpened; 49 } 50 51 @Override 52 public boolean wasStreamClosed() { 53 return outputStreamClosed; 54 } 55 56 @Override 57 public OutputStream openStream() throws IOException { 58 outputStreamOpened = true; 59 bytes.reset(); // truncate 60 return new Out(); 61 } 62 63 private final class Out extends TestOutputStream { 64 65 public Out() throws IOException { 66 super(bytes, options); 67 } 68 69 @Override 70 public void close() throws IOException { 71 outputStreamClosed = true; 72 super.close(); 73 } 74 } 75 } 76
